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Changes in hemoglobin (Hb, g/L) and reticulocyte hemoglobin content (RET-He, pg, A), respectively, RET-He/RBC-He ratio (B) established in 25 subjects during pregnancy before (1) and after (2) four weeks of iron supplementation. The horizontal line indicates the lower level of the reference range for apparently healthy subjects. The vertical lines indicate the controversial Hb range of 101–110 g/L.
